6437451641 has 2 divisors, whose sum is σ = 6437451642. Its totient is φ = 6437451640.

The previous prime is 6437451571. The next prime is 6437451677. The reversal of 6437451641 is 1461547346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5787405625 + 650046016 = 76075^2 + 25496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6437451641 is a prime.

It is not a weakly prime, because it can be changed into another prime (6437451341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218725820 + 3218725821.

It is an arithmetic number, because the mean of its divisors is an integer number (3218725821).

Almost surely, 2^6437451641 is an apocalyptic number.

It is an amenable number.

6437451641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6437451641 is an equidigital number, since it uses as much as digits as its factorization.

6437451641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 6437451641 is about 80233.7313166975. The cubic root of 6437451641 is about 1860.2500570466.

Adding to 6437451641 its reverse (1461547346), we get a palindrome (7898998987).

The spelling of 6437451641 in words is "six billion, four hundred thirty-seven million, four hundred fifty-one thousand, six hundred forty-one".